EP1174696A2 - Druckmesszelle mit Temperatursensor - Google Patents
Druckmesszelle mit Temperatursensor Download PDFInfo
- Publication number
- EP1174696A2 EP1174696A2 EP01117373A EP01117373A EP1174696A2 EP 1174696 A2 EP1174696 A2 EP 1174696A2 EP 01117373 A EP01117373 A EP 01117373A EP 01117373 A EP01117373 A EP 01117373A EP 1174696 A2 EP1174696 A2 EP 1174696A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- measuring cell
- membrane
- base body
- pressure measuring
- temperature sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0072—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance
- G01L9/0075—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance using a ceramic diaphragm, e.g. alumina, fused quartz, glass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor
- G01L9/125—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor with temperature compensating means
Definitions
- the present invention relates to a pressure measuring cell with a Temperature sensor.
- Temperature sensors are often in pressure measuring cells integrated to the static temperature error in the pressure measurement to compensate. This is the case with ceramic pressure measuring cells Temperature sensor mostly applied to the back of the ceramic, however, it can also be used in subsequent evaluation electronics be included.
- a disadvantage of such pressure measuring cells is that temperature changes of the medium, the pressure of which are measured should and often in direct contact with the pressure measuring cell acts with a considerable delay and possibly dampened affect the temperature of the temperature sensor. A resulting temperature deviation between the to measuring medium and the temperature sensor leads to errors compensation of the pressure measurement value supplied by the measuring cell.
- a pressure measuring cell with a base body and one arranged on the base body by one to be measured Pressure deformable membrane the temperature sensor between the membrane and to arrange the body.
- This placement ensures a small distance between the temperature sensor and the Medium that exerts pressure on the membrane so that the measured value the temperature sensor temperature changes of this medium quickly is able to follow.
- the disruptive influence of abrupt changes in temperature of the medium on the pressure measurement becomes significant reduced.
- a typical distance between the temperature sensor and a The outer surface of the membrane exposed to pressure can vary according to the thickness of the membrane, i.e. depending on the dimensioning of the pressure measuring cell or the pressures to be measured by them, between 0.1 and 3 mm.
- the one formed between the base body and the membrane Chamber closes.
- the base body and / or membrane of one Such a seal is advantageously made of ceramic material formed from a glass.
- the temperature sensor expediently comprises a resistance element with temperature dependent resistance. Such a resistance element can be easily generated over a large area.
- the resistance element over extends essentially the entire circumference of the measuring cell.
- the temperature value which can be determined from the resistance value of the resistance element an average over substantially the whole Represents the size of the membrane and thus an average over the entire surface of the membrane comes very close.
- the resistance element preferably meandering.
- FIG. 1 shows the pressure measuring cell according to the invention in a first Cut.
- the pressure measuring cell comprises a substantially cylindrical one Base body 1 and a membrane 2, each made of a ceramic material, which is characterized by a ring shape along the edges the mutually facing end faces of base body 1 and membrane 2 extending material layer 4 are kept spaced.
- the material layer 4 consists of a glass material. Encloses them together with the base body 1 and the membrane 2 tight a flat cylindrical chamber 3.
- the base body 1 carries in the area the chamber 3 has a centrally arranged end face Electrode 6 and a ring electrode extending concentrically thereto 7. Vias 9 connect the two electrodes with connection panels 10 on the back of the base body 1.
- the membrane 2 carries a Counter electrode 4, which is not contacted.
- the membrane 2 is by the pressure of a medium acting on its outer surface 11 deformable.
- the deformation of the membrane changes the capacity of the capacitor formed by the electrodes 6, 7, 8, so that by measuring this capacity, for example by installing the Pressure measuring cell as a capacitor in a resonant circuit and measuring from its resonance frequency, to that acting on the outer surface 11 Pressure can be closed.
- a resistance element 5 In the material layer acting as a seal for the chamber 3 4 is a resistance element 5 with a temperature-dependent resistance value embedded. Two opposite ends of the elongated Resistance elements 5 are via vias 9 connected to connection panels 10 on the back of the base body 1.
- the resistance element 5 in direct contact with the surface of the base body 1 and is from the membrane 2 through part of the Material layer 4 separated.
- the direct attachment of the resistance element 5 on the base body 1 facilitates production an electrical connection between the resistance element and the environment via the vias 9.
- the from Base body 1 facing away from the resistance element 5 forms a large heat exchange surface with the material layer 4 and over this with the membrane 2 and the (not shown) Medium that exerts the pressure to be measured on the membrane 2.
- the pressure measuring cell can be manufactured in a simple manner, by first on the base body 1 in a thick film or Thin-film technology, the temperature-dependent resistance element 5 is formed on this then a precursor for the Material layer 4 applied and on the precursor material Membrane 2 is arranged. By heating and glazing the precursor material comes the glass-like material layer formed in this way 4 in intimate contact with the base body 1 and the Resistance element 5 on the one hand and the membrane 2 on the other hand, on the one hand, the tightness of the chamber 2 against the medium whose Pressure should be measured, guaranteed, and secondly a highly efficient heat exchange from that with the medium in Contact membrane 2 over the material layer 4 with the Resistor element 5 allows.
- Strength of the membrane 2 is the distance between the outer surface 11 of the membrane and the resistance element 5 typically 0.1 to 3, preferably 0.2 to 2 mm.
- Figures 2 to 4 each show along sections the level A-A of Figure 1 different configurations of the acting as a temperature sensor, temperature-dependent resistance elements 5.
- the top view shows that in FIG Central electrode 6 and the ring electrode 7 of the base body 1 and arranged concentrically to the edge of the base body 1, the Material layer 4. This runs inside the material layer 4 temperature-dependent resistance element 5 over almost the entire Scope of the base body 1, with the exception of the distance between the two plated-through holes 9, which are used to supply the resistance element 5 serve with a measuring current.
- the temperature-dependent resistance element 5 runs on one meandering or zigzag path around essentially the entire circumference of the base body 1 from one of the two plated-through holes 9 to another.
- This configuration allows one To accommodate resistance element 5, its extended length is much greater than the circumferential length of the base body, the a high resistance value and a correspondingly strong change of the resistance value with the temperature.
- the extended Length of the resistance element 5 is a multiple of the circumferential length of the main body 1.
- the peculiarity of this Design is that they are largely arbitrary positioning of the plated-through holes 9 on the base body 1, e.g. at diametrically opposite positions as shown in Figure 4, because the length that the resistance element 5 reach can, here not proportional to the angular distance between the two vias 9 is.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims (10)
- Druckmesszelle mit einem Grundkörper (1), einer an dem Grundkörper (1) angeordneten, durch einen zu messenden Druck verformbaren Membran (2) und einem Temperatursensor, dadurch gekennzeichnet, daß der Temperatursensor zwischen der Membran (2) und dem Grundkörper (1) angeordnet ist.
- Druckmesszelle nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand zwischen dem Temperatursensor und einer dem zu messenden Druck ausgesetzten Außenfläche (11) der Membran (2) zwischen 0,1 und 3 mm beträgt.
- Druckmesszelle nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Temperatursensor in eine den Grundkörper (1) und die Membran (2) verbindende Materialschicht (4) eingebettet ist.
- Druckmesszelle nach Anspruch 3, dadurch gekennzeichnet, daß die Materialschicht (4) eine Dichtung ist, die eine zwischen dem Grundkörper (1) und der Membran (2) gebildete Kammer (3) verschließt.
- Druckmesszelle nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß der Grundkörper (1) und/oder die Membran (2) aus einem Keramikmaterial und die Materialschicht (4) aus einem Glas gebildet sind.
- Druckmesszelle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Temperatursensor ein Widerstandselement (5) mit temperaturabhängigem Widerstandswert umfaßt.
- Druckmesszelle nach Anspruch 6, dadurch gekennzeichnet, daß das Widerstandselement (5) sich über im wesentlichen den gesamten Umfang der Materialschicht (4) erstreckt.
- Druckmesszelle nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß das Widerstandselement (5) mäanderartig verläuft.
- Druckmesszelle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie eine DMS-Meßzelle ist.
- Druckmesszelle nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß sie eine kapazitive Meßzelle ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000135346 DE10035346B4 (de) | 2000-07-20 | 2000-07-20 | Druckmesszelle mit Temperatursensor |
DE10035346 | 2000-07-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1174696A2 true EP1174696A2 (de) | 2002-01-23 |
EP1174696A3 EP1174696A3 (de) | 2003-03-26 |
EP1174696B1 EP1174696B1 (de) | 2012-03-28 |
Family
ID=7649616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01117373A Expired - Lifetime EP1174696B1 (de) | 2000-07-20 | 2001-07-18 | Druckmesszelle mit Temperatursensor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1174696B1 (de) |
DE (1) | DE10035346B4 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH707387A1 (de) * | 2012-12-24 | 2014-06-30 | Inficon Gmbh | Verfahren und Vorrichtung zur Vakuumdruckmessung mit einer Messzellenanordnung. |
WO2015090771A1 (de) * | 2013-12-20 | 2015-06-25 | Endress+Hauser Gmbh+Co. Kg | Kapazitive druckmesszelle mit mindestens einem temperatursensor und druckmessverfahren |
WO2016015781A1 (de) * | 2014-08-01 | 2016-02-04 | Vega Grieshaber Kg | Druckmessanordnung und verfahren zur herstellung dieser druckmessanordnung |
CN109477828A (zh) * | 2016-01-15 | 2019-03-15 | 海斯勒阿尔特曼细胞与组织科技股份有限公司 | 一种用于测量机械应力的细胞鼓电极装置 |
EP3569995A1 (de) | 2018-05-14 | 2019-11-20 | Huba Control Ag | Sensor zur erfassung von temperatur und druck |
WO2023072660A1 (de) * | 2021-10-29 | 2023-05-04 | Vega Grieshaber Kg | Druckmesszelle mit auswerteelektronik und 4-20 ma schnittstelle |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108593187A (zh) * | 2018-05-23 | 2018-09-28 | 金陵科技学院 | 陶瓷电容式压力传感器及提高压力检测精度的方法 |
DE102018117594A1 (de) | 2018-07-20 | 2020-01-23 | Ifm Electronic Gmbh | Druckmesszelle mit Temperatursensor und Druckmessgerät mit einer solchen Druckmesszelle |
DE102020100675A1 (de) | 2019-01-14 | 2020-07-16 | Ifm Electronic Gmbh | Kapazitiver Drucksensor mit Temperaturerfassung |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4011901A1 (de) | 1990-04-12 | 1991-10-17 | Vdo Schindling | Kapazitiver drucksensor |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2615618B1 (fr) * | 1987-05-22 | 1990-11-30 | Crouzet Sa | Capteur de pression a compensation numerique |
DE8815425U1 (de) * | 1988-12-12 | 1990-04-12 | Fibronix Sensoren GmbH, 2300 Kiel | Überlastfester kapazitiver Drucksensor |
DE3912280A1 (de) * | 1989-04-14 | 1990-10-18 | Bosch Gmbh Robert | Verfahren zum herstellen eines sensors zum bestimmen von druckkraeften |
DE4111118A1 (de) * | 1991-04-03 | 1992-10-08 | Univ Chemnitz Tech | Mikromechanischer kapazitiver druckwandler |
DE4142141A1 (de) * | 1991-12-20 | 1993-06-24 | Bosch Gmbh Robert | Kraftmesseinrichtung |
US5510895A (en) * | 1993-03-05 | 1996-04-23 | Sahagen; Armen N. | Probe for monitoring a fluid medium |
DE9310968U1 (de) * | 1993-07-22 | 1994-11-24 | Robert Bosch Gmbh, 70469 Stuttgart | Einrichtung zum Messen einer Kraft |
EP0764839A1 (de) * | 1995-09-22 | 1997-03-26 | Endress + Hauser GmbH + Co. | Druck- oder Differenzdruckmessgerät |
JPH1194667A (ja) * | 1997-09-19 | 1999-04-09 | Fujikoki Corp | 圧力センサ |
-
2000
- 2000-07-20 DE DE2000135346 patent/DE10035346B4/de not_active Expired - Lifetime
-
2001
- 2001-07-18 EP EP01117373A patent/EP1174696B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4011901A1 (de) | 1990-04-12 | 1991-10-17 | Vdo Schindling | Kapazitiver drucksensor |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH707387A1 (de) * | 2012-12-24 | 2014-06-30 | Inficon Gmbh | Verfahren und Vorrichtung zur Vakuumdruckmessung mit einer Messzellenanordnung. |
WO2014102035A1 (de) * | 2012-12-24 | 2014-07-03 | Inficon Gmbh | Verfahren und vorrichtung zur vakuumdruckmessung mit einer messzellenanordnung |
US9791339B2 (en) | 2012-12-24 | 2017-10-17 | Inficon ag | Method and device for measuring a vacuum pressure using a measuring cell arrangement |
WO2015090771A1 (de) * | 2013-12-20 | 2015-06-25 | Endress+Hauser Gmbh+Co. Kg | Kapazitive druckmesszelle mit mindestens einem temperatursensor und druckmessverfahren |
US9976923B2 (en) | 2013-12-20 | 2018-05-22 | Endress + Hauser Gmbh + Co. Kg | Capacitive pressure-measuring cell having at least one temperature sensor and pressure measurement method |
EP3094951B1 (de) * | 2013-12-20 | 2020-10-28 | Endress+Hauser SE+Co. KG | Kapazitive druckmesszelle mit mindestens einem temperatursensor und druckmessverfahren |
WO2016015781A1 (de) * | 2014-08-01 | 2016-02-04 | Vega Grieshaber Kg | Druckmessanordnung und verfahren zur herstellung dieser druckmessanordnung |
CN109477828A (zh) * | 2016-01-15 | 2019-03-15 | 海斯勒阿尔特曼细胞与组织科技股份有限公司 | 一种用于测量机械应力的细胞鼓电极装置 |
EP3569995A1 (de) | 2018-05-14 | 2019-11-20 | Huba Control Ag | Sensor zur erfassung von temperatur und druck |
US11081284B2 (en) | 2018-05-14 | 2021-08-03 | Huba Control Ag | Sensor recording temperature and pressure |
WO2023072660A1 (de) * | 2021-10-29 | 2023-05-04 | Vega Grieshaber Kg | Druckmesszelle mit auswerteelektronik und 4-20 ma schnittstelle |
Also Published As
Publication number | Publication date |
---|---|
DE10035346A1 (de) | 2002-02-14 |
EP1174696A3 (de) | 2003-03-26 |
EP1174696B1 (de) | 2012-03-28 |
DE10035346B4 (de) | 2007-08-09 |
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